I'd like to add a few to this list to check whether they're ok or not;

1. Ghost blocks/ghost block generators
-Largely useless but can be used to make some great launchers (I've shown these to staff in the past and they haven't said anything, but they may not have realised it was using a bug)

2. Pumpkin/ wither skull block placers using dispensers
-also largely useless except for very short range wireless redstone and unusual doors

3. Converting between red sand and normal sand
-Does require you to have at least one of each, however I suspect this isn't allowed

4. Using lazy chunks to repair anvils
-Only mentioned this because infinite anvils are available in spawn so this doesn't really give any advantage

@_Haxington_ @HaloNest
(Sorry, I couldn't help myself...)

I’m a lyrical miracle
Your talent’s invisible
Writin’ prose so clinical, cynical
I think you’re missing the principle
Spare me your archaic prosaic
Lyrics so formulaic
Rhyming gamble with gamble? Kicking with your sword?
The lack of effort in your ramble is leaving me bored

You say eat an ice cream, well I think you’ve got brain freeze
Now let me give you some advice from the great Socrates
At least he knew he knew nothing
You don’t even know that you’re bluffing
Sitting like Rodin’s man
Did you even have a plan?
Before you started dropping your words into your bedpan

Now Hax, sit back relax and listen to the facts
As I educate you on the form of your rap
I bring the flair, I bring the skill
Your rhymes are consistently going downhill
Stuttering, muttering, repeating your words
The least elegant, eloquent lyrics I’ve heard

Now I’ve shown you both the talent you lack
This thread’s terminated, you won’t be back
And let me quote Dumas, before you turn to violence
For all evil there’s two cures; time and silence

@_Drachenzorn_ Does that actually work as an xp grinder in 1.10? Surely translocation would pull the spiders into the blocks and kill them? It kinda looks like it happens with one of the two spiders in your video.

(@misterkickman)

@misterkickman Not quite, looks like they're images from this site:
https://crafatar.com/

Which lets you customise the image url to tweak the images, including the size!
https://crafatar.com/#meta-parameters

E.g.

Pretty neat! It's also where the mugshots next to posts come from - I'm guessing thats where Sofa found it.

@FishW Huh, this is how these two effects used to stack way back before 1.5. Check out these old bug reports.

https://bugs.mojang.com/browse/MC-10480
https://bugs.mojang.com/browse/MC-83964

Unless she's running 1.8.8 looks like the 'bug' is back!

@misterkickman This is a nice design that gives you full control over how much storage space you give to each item. It can be a bit noisy though.

@thegoldsmith simple invisible door 1

I made you a 'simple' invisible door. 10 points if you can replicate it :)

https://forum.craftymynes.com/1424-staff-appreciation-challenge/4#p14266

@FishW My curiosity is piqued! Any chance of a screenshot?

Does your friends screen look like this?

Image stolen from this thread https://www.reddit.com/r/Minecraft/comments/1c4oa6/til_using_blindness_and_night_vision_effects_can/