If you’re not going to use PSN for online games or else, it’s very safe.
Just to be sure you’re aware of things like vita -bricking vpks and the risk of, again, vita -bricking ban from Sony in case you use PSN and not being very cautious. You might want to read some guides/forums first though. You might be interested: How To Play Waw Zombies With Friends Pc? Is it safe to hack PS Vita?
