Don't disable comments- we've had situations where someone would link an icon set but it'd be protected so people couldn't see it, or in theory the link could be entirely unrelated to either books or icons and we'd appreciate comments telling people that so that the entry could be removed. You are, however, welcome to direct comments elsewhere. Simply say something like "please comment under the post on my journal and not here".

We do still enforce the no disabling comments rule in that case, yes.