There's three things to remember as town though:
1. The hunt is ALL! Hunting scum is the highest priority. A townie should be willing to do anything it takes if they truly believe that they will catch scum.
HOWEVER!
2. Any action you perform that is 'not pro-town' is a risk you place both on yourself (in getting lynched) and in the town (for wasting a lynch on yourself). Any action that you perform that is distinctly anti-town runs the risk of destroying the very town you wished to save regardless of whether you actually locate scum.
3. Every action..EVERY SINGLE ACTION you do and do not do creates suspicion. Unless the town is too weak (and thus half lost already), they will suspect you for everything you do no matter what. Part of being a good townie is to expect and understand that suspicion (in fact, you should fear for your town if the suspicion never comes). This goes triple should your actions not be 'pro-town'.
The result is this: if you know you aren't acting fully pro-town but you ARE after scum then that's fine, but you should be ready for the town's inevitable attack against you. You should NOT expect them to simply accept your anti-town behavior as 'standard' since that's turning off their paranoia in order to give you a 'pass'. That's the exact point where a good scum, even fully identified, will slip away.
Instead, you have a nasty balance. You need to find a way to use your abilities to find scum while making sure you don't confuse the town OR disrupt its scumhunt. No matter WHAT evidence you have, if you confuse the town or mess up its scumhunting attempts while they try to figure you out then the mafia will slip out. The best way is to be readable. You don't need to 'act town' like some say, but you DO need people to read you and go "Ok, I can see town doing that." They may add a "...rather (messedup/stupid/annoying/anti-town/worthlesswasteoflife) town but still town" but so long as they can read you as town then you can do what you need to do.
It takes sympathy, a touch of empathy, a large batch of public relations, a ton of honesty, and a cool head. It can be done even when performing most anti-town behaviors.
No.. it MUST be done. If you can't, then you're better off learning how to become more 'pro-town' so that you'll be readable. A readable but weak-hunting player is better for the town than an unreadable but powerful scumhunter.