I've walked into town 3 times, twice alone, and never had a problem. The last time a guy from my group wanted to walk in to get to the internet cafe so we walked. Once you get past the port the pushiness usually stops plus you walk right by a police station on the way in.
I have never heard of them. Perhaps google reviews, to see what people had to say? Ive been to the other port that Oasis uses 3 times and used RCL for excursions each time to the port.
The other place we had trouble with pushiness was at the Falls, enough that I probably would not go back. That was the worst.
Conquest 7/21/13, Miracle ALASKA 8/27/13, Miracle HAWAII 9/17/13, Celebrity Summit, 11/30/13, Celebrity Summit, 12/7/13, Celebrity Constellation, 2/7/14, NCL Epic 3/2/14, Allure 5/4/14, Allure 11/2/14, Quantum 12/8/14