I'm thinking of splattering windshield wiper fluid on speeding tailgaters flashing high beams behind me.
Why would you do that? It could be dangerous.
I hear it is very frustrating when you get sprayed like that. I think there's a high chance of them getting caught in the spray because the speeds will be under 50 when this happens.
It is wrong to drive dangerously to try and take the law into your own hands. You could kill or cause an accident if you behave dangerously.
I don't think I have to care about such thing as they'll be behind me.
You should care about the safety of all the drivers on the road with you, even if they are behind you. I understand that they're frustrating you, but you still need to avoid causing an accident. Try pulling over and letting them pass.