This is an excellent example of the runs... I mean, of a run on.  They are separating two complete sentences with only a comma:  "DO Not put trash in toilets" and "It is extremely difficult to remove."  They either need a period or a semi-colon (which is the exact same as a period... and nothing else) where they have that comma.  As well, they could go with a coordinating conjunction, the combination of a comma and one of seven specific words (and, but, so, or, for, nor, yet -- here, "for" would work):  DO NOT put trash in toilets, for it is extremely difficult to remove.  Or they could make the second part an adverbial phrase:  DO NOT put trash in toilets, which is extremely difficult to remove.  Of course, it overlooks the even greater problem:  There is only one toilet.  Do they mean all toilets in general, or are they just confused?

Could Care Less, or Couldn't Care Less?

The purist will tell you that it should be “couldn’t care less,” because what you are wanting to say is that you truly don’t care.  On the other hand, if you say that you “could care less,” then you are saying you still have the capacity to care even less than you currently aren’t caring.  However, by saying you “couldn’t care less,” it assumes you know your capacity for caring, that caring is something that can even be measured.  It assumes you know at exactly what point it is that you stop caring, which obviously is not now because you’re still talking about it.  How can you possibly say that somebody is not going to come along within the next minute, and by their shear, insufferable pedagogy inspire you to care even less?  Don’t deny yourself the possibilities!  You could care less.

 If this were the Church of England, then it would be correct to spell "Judgment" with that extra "e," but it's not.  And then there was the other side of the marquee... 

 And, yeah, I know this is really picky, but it's "All is welcome."  "All" is considered singular unless it is a modifier, such as "All people are welcome."  When it is the subject, as it is here, then it is singular, even if you are talking about a group, unless, of course, you're in England.  North Portland, though, is a long way from England.