Example: http://imgur.com/ZMllHoo

It is just further documented proof that you have access to your account.

Not that I know of, most people probably will not fall for it anyways and will just end up reporting your account to Valve. Nothing you can really do at this point but wait for Steam Support to respond to your ticket.

If you have not done so already, read and do this:
https://support.steampowered.com/kb_article.php?ref=2347-qdfn-4366

Your TF2 Outpost account will most likely be banned. When you have complete control over your account once again, refer to this: https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/558747922562007365/

Note: You will need to screenahot your support ticket and include it with your appeal.

There is no set time period but they are backed up on tickets, please be patient.

Please read #1:
https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/558747922562007365/

No, but be cautious.

If what you are saying is correct, then that doesn't really solve to much in most instances. I always thought it was a limit of 5 invites per hour for everyone no matter the rank or merit.

The problem is, hi-jackers usually targets the accounts with high Steam Levels, why? Because they are the ones that make it more convincing and usually have the expensive backpacks. Most people just glance at the profile and if it has a high level, lots of games, expensive bp, etc then they will feel more comfortable and trusting when dealing with those users

Then again, those with higher leveled accounts are usually more experienced users so it probably would not happen very often. But if it were too happen, they will still be able to spam invites.

Valve needs to sit down for alittle while and fix the root of the problem rather than just half-doing everything.

Is the friend limit they put into place alittle while ago still taking effect? If so, then you shouldn't really be getting these ads from phishers very often.

I understand your frustration but with the amount of tickets the staff receives I would suggest resubmitting the ticket with evidence that can clearly prove or support your claim. Most times they do not want to go through all that work for you and by providing some proof it make their job way easier.

Well some people honestly don't know and maybe honestly believe they have a clean hat but if you say it is clean without any evidence, even after one tells you it is duped you will get banned.