It may come as a shock to learn that Alan Shearer is proving a surprise hit on Twitter since joining the site at the beginning of May. The Premier League's all-time leading scorer has cracked a string of gags — and also tried to land a new striker at his beloved Newcastle.
His first tweet set the tone:

Be warned. Any abuse and I'll come round and give you Newcastle tickets!
– Alan Shearer (@alanshearer) May 13, 2015

Since…