On the other hand, you will occasionally run across rudeness and posturing that is quite gratuitous. The flip-side of the above is that it is acceptable form to slam real offenders quite hard, dissecting their misbehavior with a sharp verbal scalpel. Be very, very sure of your ground before you try this, however. The line between correcting an incivility and starting a pointless flamewar is thin enough that hackers themselves not infrequently blunder across it; if you are a newbie or an outsider, your chances of avoiding such a blunder are low. If you're after information rather than entertainment, it's better to keep your fingers off the keyboard than to risk this.
To the first: To the first question the answer is clearly that the Church does not offer communion to someone who is practicing adultery consciously and habitually. But that does not necessarily include everyone who happens to fall under the term “divorced and remarried”: discernment is necessary about whether that is the case, and about how the grace of God may be touching a person’s heart and moving him toward salvation. To the second question: What AL says about people who find themselves in objective situations of sin but with mitigating circumstances does indeed apply to the divorced and remarried. A penitential path towards the sacraments does open for them, a path to be followed faithfully. (That such a penitential path excludes the sin of adultery goes without saying.)