I'd wonder, and maybe ask, if they need help, so I'd remember them. And people who believe they're handy might come up to chat to see what's being worked on
But someone in a PPE and a clipboard? Could be a worker, could be an assistant running an errand, could be a safety inspector, could be the big boss - it's a nice mix of "that person is probably here for a reason" and "that person might be a headache with a penchant for power trips". I'm not going to approach or remember that person
Best part - if someone with a ladder or a tool belt is looking around or hanging out somewhere, they look like they're lost. If someone with a clipboard is looking around, they're probably inspecting, and if they're opening doors or looking around somewhere unexpected, they're probably just looking for a quiet place to fill out paperwork or make a call - easy excuse with no loose threads
That's not a silly, goofy time. It's a tense, reactive, and hostile time and environment.
Don't listen to this meme. It takes a lot of planning and execution to blow up any target, regardless if you're the US Military, or some freedom fighting militia.
sugar into a concrete mixer and prevent construction and such
I used to work for a concrete precasting plant. A single 20oz bottle of coke will ruin ten cubic yards of concrete easily.
But it's even easier than that. You can spray forms/reinforcement with soda before the concrete is even poured, and it will ruin the pour because the concrete won't bond to the reinforcement.
I know you would need to be totally anonymous to get away with it but it's it really worth it if you can't do it dressed as a supervillain and leave a calling card?
Don't make threats (also don't kill people, it's usually wrong). It is too easy for Power to amplify and harness sincere backlash against your movement and whip it into counter progress outrage.
At a consultation stage don't threaten lives and infrastructure. Ask how the company will protect against sabotage and vandalism.
Are they building infrastructure that is vulnerable to ecoterrorists? If an ecoterrorist were to attack their pipeline with a high powered hunting rifle would it be an ecological disaster?
If a saboteur spread diamond grit abrasives on the rail track the coal cars travels on, would that cause damage, a derailment, or just increase maintenence costs? What about grease?
If seepage from the tailings pond was spread onto the plant manager's lawn, would he let his kids play there?