Cap point losses in pvp

I've seen a lot of complaints about people getting hit for a lot of points in pvp after reaching certain thresholds. I, too, have experienced this. This afternoon I was out with the family and not able to play when my shield expired. I had lost a lot of points that I was unable to make up when I did log in. By the end of the tournament I believe I had lost more than 300 points from my peak score.

I would like it if point losses such as this were capped in some way. Perhaps after sustaining 100 points in losses without playing a match, you receive a pseudo-shield where you are no longer visible to opponents and do not lose any additional points to attacks. So even if you have an emergency your position won't be obliterated, merely worsened.

Another player friendly idea might be an 'ultimate' shield that is free or very cheap and cannot be broken. So someone low on HP could shield early until the end of the tournament, but they could not break the shield to 'shield-hop' and would be stuck at their current score at the end of the tourney, even if that means they fall out of position for their desired prize category.

Actually those are two completely separate ideas.