My most frequently encountered minor phobia is people's gob. It seems to be really cool to gob everywhere these days - footballers' influence I reckon. Arseholes.
Cyclists that gob at me do so at their own risk
There may have to be words with certain yacfers.
I recall being on night shift, talking to an insomniac patient, when a man of Afghani extraction sauntered by, developed an expression of mild concern on his face, and paused to hoik up an immense green oyster which plopped on the floor by my feet. His issue resolved, his calm expression returned, he surveyed the end product with pride, and sauntered off back to his room