That's the main reason I don't have a paid signature. It increases your probability of being banned significantly!
I dont think thats true. The signature does not the ban make, the post quality is what does it. The correlation is between signature advertisers and low post quality, not so much bans to signature advertisers. While having a big flashy advertisement does make your spam stick out more to moderators, if you aren't spamming then it doesn't matter.