About 'acid rain' - my son had a lemon tree in his garden, and I mentioned the occasional pee would do it good. BIG mistake. He and his mates would have BBQs in our sub tropical summer, and would not bother going upstairs to the lav, but would use the tree. I should mention it gets dark early here, even in summer, so they weren't scaring the locals.
The poor tree died from overindulgence!
But I don't think you can overdo it in the compost. Once I had rats in my compost bin and would have welcomed someone supplying copious amounts of 'acid rain' on their heads, but my husband declined to volunteer. He's been very dodgy about where he pees, after the time he stopped the car for one, found a convenient brown log to water - and it reared up and hissed at him!! Brown snakes are poisonous, so I reckon he had a narrow escape.