Advertisers are being particularly bad this year, and it's going to escalate after we pass Black Friday. I just had to block a Google ad that actually contained a word of explicit adult meaning. I am putting this thread out there so if something really horrible pops up you can tell me. If it's too naughty, send it to me in a PM. It's important I know what site it comes from in order to block it.
Even if they don't bother you, remember we have younger people here. Unfortunately it seems like ads must make it to the web without being screened, and only when there have been many reports will Google take it down.