I would just remove their bags, put it on the floor and sit down.this is common everywhere lah...mcdonalds and kfcs nombor one...can't get a seat...and all the foodcourts where schools are found also the same...junction 8 u see all the rafflesians doing the same thing...they chop all the places with their books and bags...and then they talk and talk for hours...you can walk around with your tray like a bloody fool..nobody will give u a damned...this is the new generation of singaporeans we are breeding...fartup attitude and fartup upbringing....and most of all fartup education!!!
Seriously, this is the only way to handle such inconsideration.