I like to imagine Cypher hovering over Neo's shoulder, watching him play Liberal Crime Squad:
A little piece of advice. You see a tank, you do what we do. Run. You run your ass off.
Tanks are problematic because they have way too much armor, so most weapons can't damage them. Molotovs and flamethrowers are effective against them, but both are dangerous in terms of burning down your safehouse around you. Some people have success with extremely skilled Liberals wielding M16s and AK-47s. The M249 might be effective, but I've never tried it. A Liberal with ~20 strength can probably do a lot of damage with a sword (swords are very strong in LCS), but it's still risky. Ultimately, there's no good way to fight tanks, so you're best off staying out of their way.
If you fight off a police raid, they'll come back with the army. If you fight off the army, they'll come back with tanks. If you fight off their tanks, they'll start bombing your compound. That's the normal way to get the military involved. The other way is to just have way too much heat on your safehouse.
If your problem is escalating sieges, you'll want to abandon your safehouse for awhile. Let them land a raid on an empty safehouse, or bag a few martyrs, while the rest of your people hide elsewhere. Once they have a strut around your safehouse and feel victorious, you can go back without fear of tanks. If they do hit you again, it'll be the police once again. Unless your problem is having tons of heat, in which case they might skip the police raid... if that's your problem, you'll want to lay off the killing sprees for awhile.
LCS 4.06 implements heat decay on your Liberals, so you don't have to turn everybody in. You can just do a bit of safehouse hopping to let the heat burn off to a manageable level. The police won't raid a safehouse the day after you get there no matter how hot it is, so take a couple days in one place, hop to the next, and so on. Safehouses cool off if nobody is there. Do some community service if you want to burn off heat from your liberals faster.
In the long run, you'll want your secrecy level on your safehouses as high as possible if you're stationing rampaging killers there. Get EVERYBODY out of the safehouse you want to base your most dangerous dudes in, and let it cool off completely, then invest in a business front, buy a flag, and move only your hottest most wanted people in there. Secrecy directly impacts the rate that your safehouse picks up heat from the people there, and it's impacted heavily by the number of liberals you have there. More liberals means more police attention -- one squad worth can hide more easily than two or three.
If you're counting on a group of extremely wanted people to protect your non-combatants from non-police raids (which care far less about who is wanted and who has heat), then you will want to pile them all in one place, which means you can't rely on secrecy to buffer you against the heat that your hardened killers are generating. In that case, I would definitely consider retiring them from active crime committing, then turning them in and having them go to court. If you can get them acquitted, they'll be clean and can protect the safehouse without bringing down the cops on it. If they get convicted, you can spring them from jail. Even the death penalty gives you a three month window in which to break them out before they get the chair. While escaping prison is a serious charge in LCS, and they won't fare well the next time they're in court with that on their record, it still carries a much lower heat price than a hundred counts of murder will.