dafy Our organisation forbids us from using even GrapheneOS: phones are banned. This is partly to prevent our phones from being searched while in police custody, and partly to prevent our phones from being turned into spying devices for some three-letter organisation during our actions.
But what do they recommend? GOS is possibly the best at defending against this, unless they have unlocked access.
dafy but in the past I did a lot of graffiti
Don't do this, if its an approved art wall, go nuts, but don't to public places, its expensive to get cleaned off, and can damage reputations of businesses / lower the area value, plus, if your crap at art, it looks like crap, but don't do it.
Look at the stop oil protestors in the UK, all they achieved was pissing off the population, and it further damaged their reputation likely beyond repair.
Anyway, this isn't a political forum.
dafy the third time in a row that I've been subjected to full body searches and interrogations
Why though, are they giving a reason? I get generic searches when I go through airports, but nothing unusual, although one of my old bosses (he was Indian) was routinely stopped at airports, although carrying two phones (personal and work) didn't help, and wearing a hat indoors either.
GOS could in theory attract more attention to you, especially if you're on some list of watched persons as they could suspect you're using a hardened OS to hide evidence of crimes, or some other info, GOS isn't used by what I would call the "general population", and inherently increases suspicion towards certain crowds, unfortunately, despite their countless statements saying they do not support unlawful activities.
If you want to use GOS, multiple profiles could be one way, but if the officer knows what to look for, it would raise even further suspicion as to why you are using them, the general rule of thumb is have a "flat config" on, just some apps everyone would use, and don't have any data on the device, maybe you have something like Spotify on to listen to music on your flights, and something else like Netflix for movies, then load it with data afterwards, this is a common thing done by security experts, they will often use Chromebooks with basically nothing on, when they land reset the device and login again with the "real" profile.
One feature that comes to mind is the ability to essentially disable the USB port, but then if they plug it into a device, it would raise alarm bells as this is not a standard feature, it requires Googles Advanced Protection Program on Android, and Lockdown mode on iOS, obviously GOS has it natively, but still.
As @MetropleX said, look at the FAQ and see what GOS offers, but as mentioned, if your on a watchlist, using GOS may bring extra heat to you, especially with France attacking the GrapheneOS project.