Agreed. The app should be avoided at all costs for stealth practices. If you want to continue using it for one account only (your primary/legit account) and you never log into any other accounts, then it can be used for that account ONLY.
This was recently asked in these 2 threads. In the 2nd thread, aniseed provided useful guidance and exception to using the app which can be followed.
First thread is also helpful since the OP provided many other links where others asked about ebay app.