Is this actually true? It makes some kind of sense, but it is hard to guess at what percentage of thieves will be deterred, versus what percentage of thieves will be encouraged.
A buddy got pulled over by a cop who gave him a warning and then told him he recommended for him to remove his sigsauer sticker because people will walk through a parking lot looking for trucks typically with weapons manufacturer names and break in looking for a weapon to steal.
Perhaps we have a natural experiment, since California recently accidentally leaked a bunch of details about gun owners in the state: https://www.newsweek.com/gun-owners-personal-info-leak-outra...
Maybe in a year we can see if those owners experienced higher or lower than expected breakins.