Tie them up in knots following the regulations..
.what chemicals are they purchasing...?
Inspect the facilities....do they have the requisite permits...?
What machinery do they run.....is it iinstalled to code...?
Waste disposal...permits ....storage...labels and contractors.
We were protesting a clinic in the early 1990s and we found out that they were violating some fire codes. (We had some people sneaking into the clinic for a look-see.) We reported it to the city fire code people and guess what? The city fire code people came out, went in and found out it was an abortion clinic and they turned tail and walked out, and never did write them up for violating a couple of fire codes.
Maybe things have changed since then, but they have supporters who like to make things as easy as possible for the abortion crowd.