Should I change the name of my event because another event asked me to?

If their market base is pretty big and can easily be confused by the prefix "SX" regards to who is operating that concert then sure this is a...

Can I use one plot point of an established series even if i have incorperated it into my own aurthorial world plots?

It really depends. No one can claim rights to concepts or story ideas. They can only claim their own creative expression of that idea. The test for...

If i add a word to a trade marked set of words in the same field can i get an ip claim?

I think this is very likely a problem and remember even if you are able to successfully advocate the mark through this other entity is free to...

Is it discrimination if a company like Instagram or FB says bigger business' get more advertising privileges on their platform?

When you operate on their platforms you do so according to their terms. There is no such claim as discrimination against smaller businesses. Such...

Can a foreign internet personality sue american "journalism" sites like huffpost and the verge for defamation?

If they have a valid claim, they can sue, yes.

While you exposure in doing this is probably pretty low, it could be an issue. The problem is presenting a false association, sponsorship,...

If we do work for a company can we state that on our website or must we get approval even if not using the trademark?

You can certainly name the company's you have worked for descriptively in text to make that point, but as noted, you need to make sure this does...

Is it trademark infringement if someone uses my registered TM as part of their description for a product in the same space?

As noted, the only way to address this is to understand exactly what is being used and in what context. Before you take any action, I suggest...

Can I use cartoon characters with my logo to put on a shirt without permission?

Unless this character, which is a form of creative expression, is in the public domain (usually anything published previous to 1923) then this...

Can I write a novel set in the Mass Effect Universe if I only use locations and species?

It sounds like this might be considered creating a derivative work and would be infringing. Before you commit to anything, I suggest that you...