With some people, you can't log in properly with their Windows XP software. Along with that, I've dealt with some security issues on Skype as well, such as people finding my location in real life, hacking into my computer, or the dreaded DDoS (Denial-of-Service) Attacks.
I couldn't be in this because of my late-starting, I've seen commercials about this game since 2012 but never went on, thought of it as a waste of time which is why I never judge a book by it's cover anymore. Would be nice though to be able to help the game while earning some Gold, didn't know there was this method.
A little derail about Skype.
Login issues is something that can be fixed with minimal effort, I personally haven't heard of any specific XP/Skype incompatibilities and I've been using skype for the last 5 years or so.
Finding your RL location, hacking or getting DDoS'ed isn't exactly some inherent fault of skype. It's possible for IT-literate people to accomplish all that no matter if you have or do not have skype, and as far as I know Skype doesn't make it any easier. The only actual risk I see from Skype is the fact it's another place people can send you malicious links - but those can be and are shared everywhere on the internet. I'll be evil and add that if you have Java installed, and you most probably do, then it's a 100x a greater risk then skype.
That thing gets hacked on a weekly basis.
*TERRIBLE ANALOGY WARNING!!! *
Skype is a potential risk, just like having windows in your house is a potential way for someone to break in. Doesn't mean you should wall everything up. Simply minimise the risks and don't leave your keys under the plant pot.
In the last 5 years, the only real issue I saw people have with skype is the fact many to do not want to voice chat with random geeks and nerds on the internet and thus hesitate to install it.
Many people think Skype = voice chat, but all Inno asks here is text chat. And thank god too, all germans I talked to pronounce the "E" at the end of my username. >_<
Hopefully that clarifies everything, now lets get back to the actual topic.
Regards,
Draqone