As much as I dislike RYR from a pilot's / employee's point of view I have enjoyed them as a customer. It's cheap and simple to fly them if you just follow the rules. In fact, in some places like Spain you can even bend the rules to your advantage, i.e. more weight.
I hate to come to their defense but in the 100 plus times I have used them they were late only once, diverted only once but provided a free bus ride to original destination, and bumped me once for being late one minute for a snow storm. The latter was annoying indeed. Aside from that no problems at all.
In 2011, RYR had a pax volume of 72m, which is expected to grow again this year. The 500m Facebook like clicks that that unhappy woman has received are about .8 percent of the 72m folks O'Leary had flown in 2011. Don't think he cares that much.