Items that are banned in the overworld/Twilight Forest:
Quarry, Ender Quarry

Restricted to Member+
Member Rank is obtained once you have 16h of /bot

Restricted to Trusted+
Trusted Rank is obtained once you have 64h of /bot
Can set 3 homes
Can use /back on death
Can use /me command

Restricted to VIP-Gold+:
Turtles

Restricted to VIP-Diamond+:
Always on Chunk Loader
Volcanite Amulet
Evertide Amulet
Watch of Flowing Time
Nuke
ITNT
Dynamite

Items that are banned for everyone:
Cart Dispenser
TNT Cart
Lightning Red
Rainmaker
Hyperkinetic Lens
Catalytic Lens
Dark Matter Pedestal
Nova Cataclysm
Teleport Tether
Thermometer
Tunnel Bore
Hopper Facade

Items that are banned from placing/use not owning/crafting:
Watch of Flowing Time
Evertide Amulet
Volcanite Amulet
Digital Thermometer

Removed Mods
Chicken Chunks - Server Crashes (VIPs should use better chunk loader plugin instead)
Default Keys - Client Only
Inventory Tweaks - Exploit issue with Boss Shop
Map Writer - Client Only
Mouse Tweaks - Client Only
Waila/Wawla - Server Lag

Config changes that are done on the server from the default in Tekkit Legends:

CoFH - cofh\core\common.cfg
General {
# Set to true to display death messages for any named entity.
B:EnableGenericDeathMessage=false
Security {
# Set to true to allow for Server Ops to access 'secure' blocks. Your players will be warned upon server connection.
B:OpsCanAccessSecureBlocks=true

CoFH - cofh\core\client.cfg
Security {
# Set to false to disable warnings about Ops having access to 'secure' blocks upon logging on to a server.
B:OpsCanAccessSecureBlocksWarning=false

Ender Storage - enderstorage.cfg
#The size of each inventory of EnderStorage. 0 = 3x3, 1 = 3x9, 2 = 6x9
item.storage-size=2

Forge - forge.cfg
# Set this to true to remove any Entity that throws an error in its update method instead of closing the server and reporting a crash log. BE WARNED THIS COULD SCREW UP EVERYTHING USE SPARINGLY WE ARE NOT RESPONSIBLE FOR DAMAGES.
B:removeErroringEntities=true

# Set this to true to remove any TileEntity that throws an error in its update method instead of closing the server and reporting a crash log. BE WARNED THIS COULD SCREW UP EVERYTHING USE SPARINGLY WE ARE NOT RESPONSIBLE FOR DAMAGES.
B:removeErroringTileEntities=true

IC2 - IC2.cfg
# Explosion power of a nuke, where TNT is 4
S:explosionPowerNuke=1.0

# Maximum explosion power of a nuclear reactor, where TNT is 4
S:explosionPowerReactorMax=1.0

Modular Powersuits - machinemuse\powersuits.cfg
properties {
D:"Plasma Cannon.Plasma Explosiveness.Voltage.multiplier"=0

Project E - projecte\projecte.cfg
difficulty {
# Set to false to disable Gem Armor offensive abilities (helmet zap and chestplate explosion) [default: true]
B:offensiveAbilities=false
# Bonus ticks given by the Watch of Flowing Time while in the pedestal. 0 = effectively no bonus. [range: 0 ~ 256, default: 18]
I:timePedBonus=0

Tickprofiler - tickprofiler.cfg
# Name of the command to be used for TPS reports.
S:tpsCommandName=ttps

Note: Additional banned items can be added at anytime without warning