Your definition of "silly" or "shady" might not be congruent with every other person's. com domains have been seized for a variety of reasons. However, them being stolen is much more likely. As a security-inclined person, the domain registrar is the first thing I would target as an adversary. Very often they don't have 2FA; and once you have access, e-mail follows.

It goes without saying that this is only a small part of a bigger picture; using your own domain name is a good idea, but not a perfect solution.