I have been going to JWS since shortly after they opened, and I have noticed the popups when they first started. That was because they were using the trial version of the server, which the popups were paying for. The ads were selected by the server (the viruses, too). That problem has been fixed as of August 11, so it should be safe to post there now.
I like that it is close to this forum in setup. Also, I am used to JWD's rules--which are similar enough to JWS so I feel comfortable there. And, there is a swear-word filter in lieu of all the [deleted], [edited], and fxxx (with edited reason "Swearing, using hate-speech or making obscene or vulgar comments" at the bottom). All in all, that is most similar in structure to this site.