To be honest I think they are worth the registration. The debatebb.com is so general and most people don't seem to look at forums as bulletin boards or realize what the bb would mean. Plus to me it seems like just debate might be a little broad. The tvfiles since you have both would be worth more if it were something that was developed plus I don't know about tvfiles.com except it is taken.
Well the debate could be something like presidential or choose a specific major topic to debate plus getting rid of the spam bots might help. The tvfiles could be for a ton of stuff. You could start a general database for tv shows and topics that were on them to trying to start a business to where companies could host there show on the site and you set up the commercials and send them some of the procedes. There is a lot more that you could do than that even those are just a couple Ideas to help give you a jump start.