There is nothing ungrammatical about splitting infinitives, or ending a sentence with a preposition. Shakespeare and many others did (do) it all the time. These "rules" might be remnants of some style guide or other, or they may have been arbitrary school "marm" rules dreamed up to instil discipline in (or inflict maximum misery on) children.
The only "rule" about splitting infinitives is that you should place the adverb to properly convey your meaning.
"To go boldly where no man has gone before..." doesn't sound right.
There is a very useful style guide "Words into Type", Prentice-Hall. I have the 3rd edition but there are probably more recent editions by now.
Many of the things that we consider "rules" or mistakes are conventions of the day. There are real rules of grammar, of course, but many of the things that people complain about are just things that they are used to or were taught. The language has never been static and isn't now.
A good example appeared in these pages a few weeks ago. I remember because I looked it up. There was a complaint from one contributor about the use of the phrase "begs the question". The phrase has a specific cultural meaning that is different than the actual denotation of the words in the phrase. Someone used the phrase in a way that was different than its current common meaning. Doing so was not a grammatical error, it was just a misunderstanding of the cultural meaning of the phrase. In 20 years's time, that specific cultural idea may die away completely. This is not unlike using "bad" when we mean "good" or the ironic "I could care less" instead of the more accurate "I couldn't care less". Proper usage may indicate hipness but it doesn't imply that you know grammar.
Many "rules" are contextual. It is silly to insist on using the style of scientific or legal journals in a photography web forum. The articles on the site should be held to a slightly higher standard than the forums, I'd say, but some of the comments I've read lately seem over the top to me. It is just a few errors not the end of civilization.
One simple and effective way to avoid some of those errors though is to simply have someone other than the author read/proof the text before publication. This isn't a daily newspaper, there is no need to rush to deadline.