Ok, just my two cents.
If you are training nearby a large commercial-traffic airport (say, within 30 miles of PHX, ORD, MDW, EWR, IAD, FLL, etc. you get the idea) take a look at how the approach controllers vector aircraft in that area. At MDW, we are often vectored onto final for the ILS 31C in CAVU conditions to ease traffic flow (easier to do an ILS than visual when trying to coordinate high density traffic) up to 30 miles away from the airport. It has happened a few times that while flying the approach, or vectoring onto the final approach course, a VFR aircraft doing maneuvers will chandelle up to our TCAS limits and shoot off an RA, causing us to climb (or descend) away from where we are supposed to be. This has happened at least a half dozen times to me in the past 6 months.
Can you get violated? Not likely. But, you may be maneuvering in an area which is loaded with commercial traffic, causing conflicts up the kazoo. You may have visual separation with that 737 ahead, and know you will pass well clear; however, on board that 737 the TCAS system doesn't know that, and will issue an RA, causing the crew to execute a large climb or descent (3000 FPM) to evade the conflict.
When I was renting out of MDW, the instructors there always said "if you are just going to fly and do maneuvers go about 25 miles south. It's clear around there for airline traffic." Which is true. Going east, however, will put you right in some paths of traffic vectoring for 4R, 31C, or 22L.
