There's a reason that I don't automatically sign up to certain things just because I've bought a new phone and they look "cool".
I think about the consequences if it goes wrong. Not deliberate or malicious attacks, just what could happen if a server somewhere decides to go muppet and link my ID to someone else's or something.
When I bought myself and my girlfriend an S4 mini each the other month (having given it sufficient time to bed-in as a cheap stable device), I went through all the options, turned off or "skipped" anything that I could see going wrong. I have to say, reliance on outside servers features heavily. There are still half-a-dozen apps that prompt me every time I do an "Update All" because I don't agree with their permissioning and don't even want them anyway.
Linking in the Samsung Account - never even did it. Find My Phone was pointless against the in-built Google one (and I do have a Google Account, and did see value in putting it on the phone). However, even there I disabled the remote-wipe / remote-lock features while still retaining the phone-tracking (lost my phone the other day - if the battery hadn't been completely dead, it would have been very handy - as it's proved itself when I've lost it in the past).
The Samsung stuff is just junk. All the Samsung apps I've hidden or just completely uninstalled. About the only one I ever used on a previous phone was the Memo app but that's complete junk and over-complicated now, especially compared to Google Keep.
There are reasons that I just don't turn on this kind of stuff, and lock down the settings so only I can use the device anyway. This kind of vendor-reliant junk is not only open to attack, but just open to cock-up too. I'm not saying that I'm immune, but these features are really just a problem waiting to happen.
Internet-activated remote-wipe. God. I can see the use in business, where anything critical is backed up, all the devices are passcoded and encrypted, and when something goes missing you KNOW it's gone missing, can wipe and rebuild in a few moments if it's brought back. But for your own mobile? No. Not nowadays. Just encrypt. Without the encryption key, nobody can do anything with it. Inform your telco and get the IMEI blocked and forget about it unless you want to go and hunt it down.