Glicko and "vacation abuse"

I was just made aware that Chess.com ratings are based on the Glicko system, rather than the Elo system used by FIDE. The difference between the two is that the former considers something called a ratings deviation (RD), which is an approximation of the reliability of a player's rating.

While Elo does take into account each score's relative reliability, it treats that reliability index as a function of the number of games played. In Glicko, the recent frequency of games (or more technically, ratings adjusting events) is taken into account. As a result, a person who retires from play for a given period (or in our case, someone who doesn't end any games for a given period) will experience stronger ratings adjustments upon return than he would have had he played consistently.

The practical upshot, as I understand it, is that going on vacation to delay a loss will actually result in a greater reduction to your rating than you would experience were you to play it out like a gentle[insert_gender] or honorably resign.

I welcome corrections from anyone who knows the systems better than I. 

I think the way it works now is that you can't go on vacation when it's your turn in any game. I wasn't in favor of this change, since it makes it difficult for people to go on vacation legitimately if they want to be cautious with their play and take time to move, but I guess it does have that beneficial aspect.

The reason I'm thinking about it at all is that I have an opponent who's been on vacation since before the change was even made, and now has a fresh month and week of vacation for the new year. I don't know if it's a real vacation or not, but it's kind of annoying.