What do you mean by technically impossible? There are other VPN providers out there (I can name a couple that I have previously used) that do it: you have an option in their connection tool that you can turn on or off: when it is on, they block ads, when it is off, you just get everything. I find that very handy. We are not interested in traffic inspection, not even to block ads. Traffic inspection has profound effects and legal consequences: it's contrary to our policy and mission, it weakens remarkably the anonymity layer, it opens the doors dangerously to logging and monitoring and affects in both major and subtle ways the mere conduit status of a service provider in the information society (exemption of liability for users of the service behavior is reduced when the provider selects the content to re-transmit, as past jurisprudence in the EU has widely shown). About traffic discrimination on your end (in your system) you can of course do as you prefer, there are many tools around which meet your needs without overloading our software with options unrelated to our mission or (even worse!) making it become bloatware. Kind regards