I am also noticing accounts that just woke up. Not a ton so far 10 range but not sure if I should auto nuke those guys or give them a chance? Technically they haven't done anything wrong and I don't know if they're bought accounts, hacked accounts, or what.
If you were managing a campaign as like bustadice, mintdice, windice or any other, you would certainly not accept the inactive accounts. That's what I too followed when I had checked the applicants in 2dice, I think you must follow that, it will let you minimize the spam. Most of the inactive accounts which woke up for joining signature campaign will provably produce spam.
By the way, the decision is up to you. You are experienced CM here and you know better than almost everyone what is good and what bad for both the forum and the project. I know you will control everything within couple of days.
Best of luck.
For me, give them a chance, because they are not yet spamming but grade the post that they are going to make after joining the campaign. Because me too I take several months of paused and then go back here in bitcointalk, but yeah, I improve my post quality first before joining a campaign.
Or just a make a new rule that the woke up account can't join the campaign because they will be automatically kicked. But just like Little Mouse said, It's up to you, Goodluck sir! Best of luck for the yobit signature campaign