Facebook comment block all my accounts

I would like to ask you, as soon as I make facebook account to post comments in group tomorrow my account gets banned for commenting. I found that facebook suspects I have multiple accounts, so that is the reason. This didn't happen before. Should I change ip's when I login on another account? Any suggestions?

you create an accoutn and spam the shit out of it on the next day? this is not a "normal behavior" for an average account. warm it up first. let it look like alegit account.

buying old / pva/ legit looking account is a must when you're trying to spam.

Agree with the above, also, try to make legit comments in the groups before blasting out spam, make them as real as possible. Also, I think a different IP/proxy per account is a must if you want to avoid a ban on all your accounts.