To a certain extent, yes. But you could apply that same logic to people who do indecent exposure. At some point, if you're setting up for 4+ hours in a tiny coffee shop with a laptop replacement and you're not buying more than just a cup of joe, you're doing a net-bad for your community by making that coffee shop and thus cheap community spaces less viable.

If you want to do it in a Panera or SBux go ahead but not in a local shop. Being conscientious is actually a good thing, believe it or not.

There are plenty of local shops that are large, have plenty of seating, and don't mind you staying for several hours. It's up to the shop to enforce rules if it doesn't want people camping or using laptops or if it wants to require purchase.