I'm trying to parse what you said there Magma and I've determined I have no idea what you mean when you say "privileges." Define, please?
Well, as far as I know about these people (is there a common name for them?), they refer to a "privilege" as "a physical/mental/emotional property which is accepted in general, bigoted, society and does not, directly or indirectly, lower your ability to achieve whatever you want". Commonly stated "privileges" include "not being fat", "not being disabled", "not being stupid", "not being single", "not being ugly", "not being (most of the items on
this list)", and so forth, which means people like you and me have a damn lot of privileges.
"Check your privileges" is a commonly used term there, and it means something like "You should not take your privileges for granted". It is used when a "cis"-user without a specific privilege witnesses a person with that privilege use or take for granted this privilege, in a context that tries to make the privileged person feel personally responsible for the privilege difference. My guess is that they feel envious a lot, and need to vent this pent-up jealousy in personal attacks, then rationalize that by randomly appending "#social #injustice #oppression" to their thoughts and then thinking about something else instead of realizing that they're being horribly irrational.
Gabe from Penny Arcade for example "took for granted" that all "women" have vaginas, and suddenly a crapload of "women" without vaginas (as in "people with a female 'consciousness'") got butthurt about that and decided to spam him with hate, which was IMO entirely unjustified, since "women" can generally also refer to "people with vaginas", and "The Women's Guide To Masturbation" is a context in which anyone can see that "women" here has the second meaning, except those people who have made it a habit to get offended at anything, even if they have to pedantically misrepresent stuff for that purpose. Even with the first meaning, "The Women's Guide To Masturbation" still sounds better than "The People-With-Physically-Existing-Functional-And-Stimulatable-Female-Human-Sexual-Organs-And-The-Ability-To-Erotically-Stimulate-Them's Guide To Masturbation".
3xEdit: With all those new words they invent, you'd think they could by now differentiate between physical females and mental females.
My best guess is you're saying you should be able to call people whatever you want and they shouldn't be offended, which of course is ridiculous. I'm hoping I'm wrong, though.
Good thing you're wrong, because that would, in fact, be ridiculous. I'm just saying they should stop being offended by whatever you say.
Edit: NINJAS
EditEdit: Oh right, it's because I took so long to post this.