When you look at the ridiculous shifts & the dire pay that the folks over at Servisair - GlobeGround get, it's not so surprsing to see why their staff are so surly, rude & on occasions aggressive towards their passengers. Whilst of course it's extremely unprofessional to take out your bad mood or bitterness on your customers, from time to time all of us have probably done it.
I'm not sure whether it's because their staff tend to be either very young or clearly have been in the industry for too long, but from experience, the staff seem to lack any sort of customer service skills.
Out of interest, at which bases are EasyJet still being handled by Servisair besides EMA? The sooner they go to Aviance or Menzies the better ...