The problem with low level tennis is that most people expect to be avoided if their body is between the ball and a winner. At high levels people have already been beaned and know a "problem ball" when they see it. Even the pros get beaned sometimes and "cover up" when they know they're vulnerable.
High level tennis, anything goes really, and beaning is a regular activity. There's only a problem when it appears someone was intentionally beaned and then the opposing players start trying to retaliate.
In low level tennis, if your OH is one of your best shots, I would really recommend playing it (more or less) at the net person on a bad lob/pass. Why? Because at that level you probably have only a few "weapons" anyway, so intimidating them with overheads whenever they play a bad shot is surely a legit tactic.