Reading the article on how coffee shops, mostly the independents, are beginning to limit and discourage laptop use, I was reminded of my own experiences. I happen to like Panera Bread and there was a location near my old office. However, it was a royal pain to eat there as there was rarely room to sit.
On the occasions I managed to go in AND get a seat, I observed people with a cup of water or a single coffee taking up entire tables for 6, but by themselves. I witnessed some of these laptop users taking their own food or microwave meals out of backpacks and using Panera's microwave to cook them. I often wondered where this insane sense of entitlement came from. This is a business that provides a free service to complement your meal and the business you give them. Yet, these laptop users acted as though it was their Internet provider and we lunchers were in their way. Unbelievable.
I am not a coffee drinker, but I do sometimes take my notebook and wander into a Panera or other establishment that offers WiFi. I'll usually get some food and a drink, then partake of the WiFi service for a bit. But I have always been cognizant of the establishment's clientele and whether the seat/table was needed. It wouldn't occur to me to NOT do that.