I sometimes click on facebook ads when I have no interest in the product or service being marketed
What kinds of ads do you click?
Ones about clothes mostly.
As long as you are sure the ads don't inundate you with viruses or something, it is fine to click on them. You are supporting the companies that are behind the advertisements.
I have the latest virus protection software on my PC.
Then you should be fine. Supporting companies you like by clicking on their ads is fine to do.