What I want are European style plans. They have unlimited data, but depending on how much you pay per month your actual bandwidth, not the amount of data, is shaped. So the 15 Euro plan caps at 384 kbps, the 50 Euro plan at 2 Mbps etc. That allows people to use a 3/4G modem as their primary network connection if they just want to do email, web browsing and basic youtube; and it won't kill the network, and it's cheap.
The one blind person I once tutored at my university completely ignored all those signs -- she had no way of knowing they were there, and she didn't spend time groping the walls looking for signs that might or might not be there. Elevator buttons and such yes, but random wall signs no.
A list is only as strong as its weakest link. -- Don Knuth