Opening a port on your router can be a risky, but firstly the burglar would need to know that you have a texecom alrm system, secondly he would need to know a fair bit about hacking, I do know someone who can do it, but he makes enough money not to have to turn to crime. At the end of the day it is all about risk, if your house is full of valuables and is well known for it, then dont use a Texecom panel with the app. If your house is average domestic with the average stuff inside, then I would not worry too much most average burglars wont be hacking your network for drug money. But if you are that bothered there are panels with apps that do not require you to open ports on your router