My general advice would be: if you're registering your domain to use it for profit - to resell, or to drive traffic, or for an ecommerce website - you should check that you're not infringing any trademarks.
The only time a legit domain registrant might get in trouble over trademark laws is if they failed to check that their new domain name hasn't already been trademarked by someone else. For example, UTube.com, a scaffolding company, has been arguing with YouTube.com for ages because of misdirected emails etc. This is something to be careful of.
Gripe sites are notorious for keeping
trademark domain names. See Alfred Donovan's gripe site about Pipex
. The domain name is pipexcommunicationsplc.com, and he gets away with it because he displays no advertising, he's never tried to sell the domain to Pipex or anyone else, and he has a "legitimate interest" in the domain. (See the precedent set in WIPO documentation
about Donovan's previous argument over royaldutchshellplc.com
If you're intending to use a trademark to profit from it illegitimately, you deserve to be caught!