As suggested:
the wikitext emitted from the WikiLove tool should have a comment in it to say it was produced by the WikiLove tool with some suitable link, so it educates people to use the tool
I.e. WikiLove should automatically add a hidden comment after the user's signature, such as:
<!-- message sent using the WikiLove tool. Click the ♥ at the top of userpages to send WikiLove. -->
or similar.